Thread pitch gauge
A thread pitch gauge,[1] also known as a screw pitch gauge[2] or pitch gauge,[3] is used to measure the pitch or lead of a screw thread. The uppermost gauge in the image is an ISO metric pitch gauge, the larger gauge in the center is for measuring the Acme thread form, and the lower gauge is for Whitworth screws.
Thread pitch gauges are used as a reference tool in determining the pitch of a thread that is on a screw or in a tapped hole. This tool is not used as a precision measuring instrument. This device allows the user to determine the profile of the given thread and quickly categorize the thread by shape and pitch. This device also saves time, in that it removes the need for the user to measure and calculate the thread pitch of the threaded item. However, if not handled with care, a backlash error occurs. BACKLASH ERROR: due to constant use, there is always some space for the play of the screw. this space increases with the use or due to wear and tear, and wear and tear, so that when the screw is moved by rotating it in some direction, it slips in the nut and does not cover any linear distance for some rotation of the screw head. the error due to this is known as backlash error. it is avoided by turning the screw always in the same direction,
See also
References
- ^ Schnetler, Jenny; Majiet, Salie (2007), FCS Fitting and Turning: Level 2, Pearson South Africa, p. 34, ISBN 978-1-86891-764-8.
- ^ Erjavec, Jack (2004). Automotive Technology. Thomson Delmar Learning. p. 85. ISBN 978-1-4018-4831-6.
- ^ Webster, Jay (2001). Outdoor Power Equipment. Albany: Delmar Thomson Learning. p. 67. ISBN 978-0-7668-1391-5.
External links
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